Greg Oden is still on the Celtics’ radar, but the oft-injured free agent center doesn’t seem to be a high priority. There have been good reports lately on Oden, who met with the C’s three months ago. “We’ll look into Greg still,” Ainge said of the 2007 No. 1 overall pick who hasn’t played since making 21 appearances in the 2009-10 season. “He wasn’t ready to play when we saw him last. He wasn’t ready to work out — I mean, not like a real workout. We’ll probably check into that some time this summer.”